The star explained she decided to let the cameras go in behind the scenes for the first time to mark the 25th - and last - season of her chat show, which starts on 1 January on her own new television station, the Oprah Winfrey Network (OWN).

She called it 'an uncensored look into the private world of our show' run by the 'hardest working people in television - in showiness, in fact.'